118228169 has 2 divisors, whose sum is σ = 118228170. Its totient is φ = 118228168.

The previous prime is 118228147. The next prime is 118228177. The reversal of 118228169 is 961822811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70341769 + 47886400 = 8387^2 + 6920^2 .

It is an emirp because it is prime and its reverse (961822811) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-118228169 is a prime.

It is a super-2 number, since 2×118228169² = 27955799890185122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (118228129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59114084 + 59114085.

It is an arithmetic number, because the mean of its divisors is an integer number (59114085).

Almost surely, 2^118228169 is an apocalyptic number.

It is an amenable number.

118228169 is a deficient number, since it is larger than the sum of its proper divisors (1).

118228169 is an equidigital number, since it uses as much as digits as its factorization.

118228169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13824, while the sum is 38.

The square root of 118228169 is about 10873.2777486828. The cubic root of 118228169 is about 490.8027505239.

It can be divided in two parts, 11822 and 8169, that added together give a palindrome (19991).

The spelling of 118228169 in words is "one hundred eighteen million, two hundred twenty-eight thousand, one hundred sixty-nine".